At the end of August we went to RHS Wisley and really liked their succulent pictures that were mounted on easels.
Darren made a frame for me yesterday....
..... and he used the frame to surround a plastic plant tray that I filled with soil and perlite (to keep the weight down a bit).
We then covered it with a membrane to hold the soil in, and a metal grid to hold the plants in place, and then topped off with the wooden picture frame.
I have lots of succulents growing in the garden, and I found that you have to put fairly small ones in to fit around the mesh. I am going to leave it lying down in the greenhouse to grow over the winter and hopefully put it up next spring.